Physics

Physics

Problem

A continuous-wave laser emits

15.0\,\text{mW}

of light at

450\,\text{nm}

. If a solution placed in the beam absorbs

35\%

of the incident photons over a period of

2.0\,\text{min}

, approximately how many photons are absorbed? a)

2.6\times10^{18}

b)

1.4\times10^{18}

c)

1.4\times10^{17}

d)

4.2\times10^{18}

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